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Re: xfs errors while unlinking filenames with hash collisions

To: Mark Tinguely <tinguely@xxxxxxx>
Subject: Re: xfs errors while unlinking filenames with hash collisions
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 27 Mar 2014 16:24:48 +0100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <53344075.8050607@xxxxxxx>
References: <20140327074156.GJ29498@xxxxxxxxxxxxxxxxxxxxxxxxx> <5334241E.9060708@xxxxxxx> <20140327132354.GU29498@xxxxxxxxxxxxxxxxxxxxxxxxx> <533428D6.507@xxxxxxx> <20140327140556.GW29498@xxxxxxxxxxxxxxxxxxxxxxxxx> <53344075.8050607@xxxxxxx>
On Thu, Mar 27, 2014 at 10:15:01AM -0500, Mark Tinguely wrote:
> On 03/27/14 09:05, Hannes Frederic Sowa wrote:
> >On Thu, Mar 27, 2014 at 08:34:14AM -0500, Mark Tinguely wrote:
> >>On 03/27/14 08:23, Hannes Frederic Sowa wrote:
> >>>On Thu, Mar 27, 2014 at 08:14:06AM -0500, Mark Tinguely wrote:
> >>>>Have you tried to run a xfs_repair on the filesystem after the reboot?
> >>>
> >>>Yes, I did. I still use the filesystem and it works. As soon as I try to
> >>>remove the directory again the same splash from above happens again.
> >>
> >>Is it the latest xfsprogs' repair?
> >>
> >>Do you have the output from the repair still?
> >
> >I can easily test this here, so you can throw any commands and tests at
> >me. ;)
> >
> >This is the output:
> >
> >(I replayed the journal before that)
> >
> >pre-mount:/# xfs_repair -V
> >xfs_repair version 3.1.11
> >pre-mount:/# xfs_repair -v /dev/vda1
> >Phase 1 - find and verify superblock...
> >         - block cache size set to 372848 entries
> >Phase 2 - using internal log
> >         - zero log...
> >zero_log: head block 5071 tail block 5071
> >         - scan filesystem freespace and inode maps...
> >         - found root inode chunk
> >Phase 3 - for each AG...
> >         - scan and clear agi unlinked lists...
> >         - process known inodes and perform inode discovery...
> >         - agno = 0
> >bad hash ordering in block 8388739 of directory inode 3543184
> 
> interesting. I will see if I can recreate it.
> 
> Are you open to making it an xfstest?

Sure, I'll put it on my todo list for the weekend.

Thanks,

  Hannes

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